Marcin Wojtas dc35a10f68 net: mvneta: bm: add support for hardware buffer management ... Buffer manager (BM) is a dedicated hardware unit that can be used by all ethernet ports of Armada XP and 38x SoC's. It allows to offload CPU on RX path by sparing DRAM access on refilling buffer pool, hardware-based filling of descriptor ring data and better memory utilization due to HW arbitration for using 'short' pools for small packets. Tests performed with A388 SoC working as a network bridge between two packet generators showed increase of maximum processed 64B packets by ~20k (~555k packets with BM enabled vs ~535 packets without BM). Also when pushing 1500B-packets with a line rate achieved, CPU load decreased from around 25% without BM to 20% with BM. BM comprise up to 4 buffer pointers' (BP) rings kept in DRAM, which are called external BP pools - BPPE. Allocating and releasing buffer pointers (BP) to/from BPPE is performed indirectly by write/read access to a dedicated internal SRAM, where internal BP pools (BPPI) are placed. BM hardware controls status of BPPE automatically, as well as assigning proper buffers to RX descriptors. For more details please refer to Functional Specification of Armada XP or 38x SoC. In order to enable support for a separate hardware block, common for all ports, a new driver has to be implemented ('mvneta_bm'). It provides initialization sequence of address space, clocks, registers, SRAM, empty pools' structures and also obtaining optional configuration from DT (please refer to device tree binding documentation). mvneta_bm exposes also a necessary API to mvneta driver, as well as a dedicated structure with BM information (bm_priv), whose presence is used as a flag notifying of BM usage by port. It has to be ensured that mvneta_bm probe is executed prior to the ones in ports' driver. In case BM is not used or its probe fails, mvneta falls back to use software buffer management. A sequence executed in mvneta_probe function is modified in order to have an access to needed resources before possible port's BM initialization is done. According to port-pools mapping provided by DT appropriate registers are configured and the buffer pools are filled. RX path is modified accordingly. Becaues the hardware allows a wide variety of configuration options, following assumptions are made: * using BM mechanisms can be selectively disabled/enabled basing on DT configuration among the ports * 'long' pool's single buffer size is tied to port's MTU * using 'long' pool by port is obligatory and it cannot be shared * using 'short' pool for smaller packets is optional * one 'short' pool can be shared among all ports This commit enables hardware buffer management operation cooperating with existing mvneta driver. New device tree binding documentation is added and the one of mvneta is updated accordingly. [gregory.clement@free-electrons.com: removed the suspend/resume part] Signed-off-by: Marcin Wojtas <mw@semihalf.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-03-14 12:19:46 -04:00
..
ABI	With this patchset we finally introduce our new routing protocol:	2016-03-01 17:48:00 -05:00
accounting	Documentation-getdelays: Apply a recommendation from "checkpatch.pl" in main()	2015-12-24 07:22:32 -07:00
acpi	mfd: core: redo ACPI matching of the children devices	2015-10-26 15:25:53 +01:00
aoe
arm	ARM: SoC multiplatform code changes for v4.5	2016-01-20 18:03:56 -08:00
arm64	arm64: Documentation: add list of software workarounds for errata	2015-12-11 17:33:21 +00:00
auxdisplay
backlight
blackfin	Docs: blackfin: Use new switch macro SAMPLE_IRQ_TIMER instead of IRQ_TIMER5	2015-05-07 09:35:14 -06:00
block	A relatively boring cycle in the docs tree. There's a few kernel-doc	2016-01-17 11:55:07 -08:00
blockdev	zram: update documentation	2015-09-24 15:39:42 -06:00
bus-devices
cdrom
cgroup-v1	cgroup: rename cgroup documentations	2016-01-11 23:14:51 -05:00
cma	cma: debug: document new debugfs interface	2015-04-14 16:49:00 -07:00
connector
console
cpu-freq	Documentation: cpufreq: intel_pstate: enhance documentation	2016-01-05 13:47:37 +01:00
cpuidle
cris
crypto	KEYS: Merge the type-specific data with the payload data	2015-10-21 15:18:36 +01:00
development-process
device-mapper	dm verity: add ignore_zero_blocks feature	2015-12-10 10:39:03 -05:00
devicetree	net: mvneta: bm: add support for hardware buffer management	2016-03-14 12:19:46 -04:00
dmaengine	Merge branch 'topic/async' into for-linus	2016-01-06 15:17:47 +05:30
DocBook	[media] media.h: get rid of MEDIA_ENT_F_CONN_TEST	2016-02-16 09:15:23 -02:00
driver-model	driver-core: platform: Provide helpers for multi-driver modules	2015-10-05 05:02:40 +01:00
dvb	[media] use https://linuxtv.org for LinuxTV URLs	2015-12-04 10:38:59 -02:00
early-userspace
EDID
extcon
fault-injection	net: Add support for CHANGEUPPER notifier error injection	2015-12-03 11:49:23 -05:00
fb	Documentation/fb: add documentation for sm712fb	2015-08-07 15:05:01 -07:00
features	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
filesystems	efi: Make efivarfs entries immutable by default	2016-02-10 16:25:52 +00:00
firmware_class
fmc
fpga	usage documentation for FPGA manager core	2015-10-07 18:07:20 +01:00
frv
gpio	Doc: gpio: Fix typos in Documentation/gpio	2015-11-20 16:51:16 -07:00
hid	HID: sensor: Update document for custom sensor	2015-04-10 22:22:56 +02:00
hwmon	hwmon: (pmbus) Add client driver for LTC3815	2015-12-18 08:20:59 -08:00
i2c	i2c: i801: add Intel Lewisburg device IDs	2015-11-20 16:22:21 +01:00
ia64
ide
iio	iio: Documentation: Add IIO configfs documentation	2015-12-03 18:19:28 +00:00
infiniband	IB: remove in-kernel support for memory windows	2015-12-23 14:29:04 -05:00
input	Input: add userio module	2015-10-27 18:55:31 -07:00
ioctl	Doc: ioctl: Fix typos in Documentation/ioctl	2015-11-20 16:52:50 -07:00
isdn
ja_JP	Documentation: translations: update linux cross reference link	2016-01-11 18:26:58 -07:00
kbuild	kbuild: document recursive dependency limitation / resolution	2015-10-08 15:36:16 +02:00
kdump
ko_KR	Documentation: translations: update linux cross reference link	2016-01-11 18:26:58 -07:00
laptops	Move freefall program from Documentation/ to tools/	2015-06-08 16:42:07 -06:00
leds	Documentation: leds: Add description of brightness setting API	2016-01-04 09:57:31 +01:00
locking	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-11-03 16:10:43 -08:00
m68k
memory-devices
metag
mic	misc: mic: Update MIC host daemon with COSM changes	2015-10-04 12:54:54 +01:00
mips
misc-devices	Doc:misc-devices: Fix typo in Documentation/misc-devices	2015-09-18 10:04:24 -06:00
mmc	mmc: core: Remove MMC_CLKGATE	2015-10-26 16:00:09 +01:00
mn10300
mtd	Documentation: mtd: improve nand_ecc.txt for readability and correctness	2015-11-17 17:05:14 -08:00
namespaces
netlabel
networking	kcm: Add description in Documentation	2016-03-09 16:36:16 -05:00
nfc	NFC: Fix typo in nfc-hci.txt	2015-06-08 23:15:45 +02:00
nios2
nvdimm	libnvdimm: documentation clarifications	2015-11-12 09:55:23 -08:00
nvmem	Documentation: nvmem: add nvmem api level and how-to doc	2015-08-05 13:43:45 -07:00
parisc
PCI	The documentation tree update for 4.1. Numerous fixes, the overdue removal	2015-04-18 11:10:49 -04:00
pcmcia	pcmcia: Fix typo in locking documentation	2015-08-07 14:34:58 +02:00
phy
platform
power	Merge branches 'pm-pci' and 'pm-core'	2016-01-12 01:10:52 +01:00
powerpc	SCSI misc on 20150901	2015-09-02 12:22:54 -07:00
pps	Doc: pps: Fix file name in pps.txt	2015-07-14 12:35:42 -06:00
prctl	Documentation/prctl: don't build tsc tests when cross compiling	2015-06-22 16:05:04 -06:00
pti
ptp	testptp: Silence compiler warnings on ppc64	2015-09-29 21:16:56 -07:00
rapidio
RCU	documentation: Update RCU requirements based on expedited changes	2015-12-05 12:34:32 -08:00
s390	s390/zcore: remove /sys/kernel/debug/zcore/mem	2015-11-27 09:24:12 +01:00
scheduler	sched/dl/Documentation: Split Section 3	2015-05-19 08:39:21 +02:00
scsi	st: allow debug output to be enabled or disabled via sysfs	2015-11-09 17:17:27 -08:00
security	keys, trusted: seal with a TPM2 authorization policy	2015-12-20 15:27:13 +02:00
serial	Documentation: improve line discipline method descriptions	2015-10-05 04:53:26 +01:00
sh
sound	ASoC: img: Add documentation for SPDIF in controls	2015-11-16 10:06:58 +00:00
spi	spi: tools: move spidev_test metadata	2015-11-30 12:14:12 +00:00
sysctl	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-01-22 10:24:03 -08:00
target	target: use per-attribute show and store methods	2015-10-13 22:17:49 -07:00
thermal	thermal: add description for integral_cutoff unit	2016-01-14 13:29:08 -07:00
timers	hpet: Drop stale URLs	2016-02-17 09:39:56 +01:00
tpm
trace	x86, tracing, perf: Add trace point for MSR accesses	2015-12-06 12:56:10 +01:00
usb	The chipidea changes for v4.5-rc1	2015-12-26 16:59:14 -08:00
vDSO	Documentation/vDSO: don't build tests when cross compiling	2015-06-22 16:04:57 -06:00
video4linux	[media] media framework: rename pads init function to media_entity_pads_init()	2016-01-11 12:19:03 -02:00
virtual	KVM doc: Fix KVM_SMI chapter number	2016-01-26 16:29:59 +01:00
vm	Merge branch 'akpm' (patches from Andrew)	2016-01-17 12:58:52 -08:00
w1	w1: masters: omap_hdq: add support for 1-wire mode	2015-10-05 04:47:09 +01:00
watchdog	Add sun4v_wdt watchdog driver	2016-01-31 11:06:24 -08:00
wimax
x86	Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-09-01 10:07:40 -07:00
xtensa
zh_CN	[media] media framework: rename pads init function to media_entity_pads_init()	2016-01-11 12:19:03 -02:00
00-INDEX
adding-syscalls.txt	Documentation: describe how to add a system call	2015-08-13 17:54:06 -06:00
applying-patches.txt
assoc_array.txt
atomic_ops.txt	locking/atomics, cmpxchg: Privatize the inclusion of asm/cmpxchg.h	2015-09-13 10:35:46 +02:00
bad_memory.txt
basic_profiling.txt
bcache.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
cgroup-v2.txt	Merge branch 'for-4.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2016-02-10 11:36:19 -08:00
Changes	There is a nice new document from Neil on how pathname lookups work and	2015-11-05 15:59:24 -08:00
circular-buffers.txt
clk.txt	clk: change clk_ops' ->determine_rate() prototype	2015-07-27 18:12:01 -07:00
coccinelle.txt
CodeOfConflict
CodingStyle	Documentation: fix typo in CodingStyle	2016-01-11 18:18:16 -07:00
cpu-hotplug.txt	Documentation: cpu-hotplug: Fix sysfs mount instructions	2015-12-10 11:35:30 -07:00
cpu-load.txt
cputopology.txt	Documentation: Update cputopology.txt	2015-05-27 15:22:15 +02:00
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
dell_rbu.txt
devices.txt
digsig.txt
DMA-API-HOWTO.txt	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
DMA-API.txt	DMA-API: fix confusing sentence in Documentation/DMA-API.txt	2016-01-11 18:29:00 -07:00
DMA-attributes.txt
dma-buf-sharing.txt	dma-buf: cleanup dma_buf_export() to make it easily extensible	2015-04-21 14:47:16 +05:30
DMA-ISA-LPC.txt
dontdiff	Documentation: dontdiff: remove media from dontdiff	2015-11-11 10:08:07 -07:00
dynamic-debug-howto.txt
edac.txt	EDAC: Remove references to bluesmoke.sourceforge.net	2015-11-26 14:46:06 +01:00
efi-stub.txt
eisa.txt
email-clients.txt	A few more documentation patches that wandered in and have no reason to	2015-11-13 09:19:05 -08:00
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
gdb-kernel-debugging.txt
highuid.txt
HOWTO	Documentation: HOWTO: update code cross reference link	2015-12-10 11:19:35 -07:00
hsi.txt
hw_random.txt	hwrng: doc - Fix device node name reference /dev/hw_random => /dev/hwrng	2015-09-21 22:00:41 +08:00
hwspinlock.txt	hwspinlock/core: add device tree support	2015-05-02 09:54:30 +03:00
init.txt
initrd.txt
intel_txt.txt
Intel-IOMMU.txt	iommu/vt-d: Fix link to Intel IOMMU Specification	2016-01-29 12:32:12 +01:00
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt	ipmi watchdog : add panic_wdt_timeout parameter	2015-11-16 06:28:43 -06:00
IRQ-affinity.txt
IRQ-domain.txt	irqdomain: Documentation updates	2015-10-13 19:01:25 +02:00
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kasan.txt	mm, slub, kasan: enable user tracking by default with KASAN=y	2015-11-05 19:34:48 -08:00
kernel-doc-nano-HOWTO.txt	Documenation: Update location of docproc.c	2015-07-14 12:36:39 -06:00
kernel-docs.txt	Documentation: translations: update linux cross reference link	2016-01-11 18:26:58 -07:00
kernel-parameters.txt	Merge branch 'for-4.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2016-02-10 11:04:05 -08:00
kernel-per-CPU-kthreads.txt	irq_poll: make blk-iopoll available outside the block layer	2015-12-11 11:52:24 -08:00
kmemcheck.txt	Documentation: update the CONFIG_DEBUG_PAGEALLOC description	2015-03-20 07:41:55 -06:00
kmemleak.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
kobject.txt
kprobes.txt	kprobes: Update Documentation/kprobes.txt	2015-03-20 07:41:55 -06:00
kref.txt
kselftest.txt	Documentation: Update kselftest.txt	2015-09-24 15:51:53 -06:00
ldm.txt
local_ops.txt
lockup-watchdogs.txt	kernel/watchdog.c: add sysctl knob hardlockup_panic	2015-11-05 19:34:48 -08:00
logo.gif
logo.txt
lzo.txt
magic-number.txt	Documentation/magic-number: Remove SCC_MAGIC	2015-05-13 15:39:04 -04:00
mailbox.txt	Documentation: minor typo fix in mailbox.txt	2015-08-13 18:03:18 -06:00
Makefile	spi: Move spi code from Documentation to tools	2015-11-23 14:54:01 +00:00
ManagementStyle
md-cluster.txt	md-cluster: update the documentation	2016-01-06 11:39:06 +11:00
md.txt	doc:md: fix typo in md.txt.	2015-06-23 06:49:44 -06:00
memory-barriers.txt	virtio: barrier rework+fixes	2016-01-18 16:44:24 -08:00
memory-hotplug.txt	mem-hotplug: fix typo in Documentation/memory-hotplug.txt	2015-03-20 07:41:55 -06:00
men-chameleon-bus.txt	Documentation: Minor changes to men-chameleon-bus.txt	2015-07-24 15:15:17 +02:00
module-signing.txt	Move certificate handling to its own directory	2015-08-14 16:06:13 +01:00
mono.txt
nommu-mmap.txt
ntb.txt	NTB: Rename Intel code names to platform names	2015-07-04 14:09:25 -04:00
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
phy.txt	phy: core: Add devm_of_phy_get_by_index to phy-core	2015-05-11 21:42:23 +05:30
pi-futex.txt
pinctrl.txt	pinctrl: move strict option to pinmux_ops	2015-05-06 14:45:19 +02:00
pnp.txt
preempt-locking.txt	x86/fpu: Rename math_state_restore() to fpu__restore()	2015-05-19 15:47:18 +02:00
printk-formats.txt	printk-formats.txt: remove unimplemented %pT	2016-01-16 11:17:30 -08:00
pwm.txt
ramoops.txt
rbtree.txt	documentation: fix small typo in rbtree.txt	2015-09-13 14:38:50 -06:00
remoteproc.txt	remoteproc: introduce rproc_get_by_phandle API	2015-06-16 21:12:52 +03:00
rfkill.txt	rfkill: Add documentation about LED triggers	2016-02-24 09:13:12 +01:00
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt	Documentation, split up rtc.txt into documentation and test file	2015-03-24 22:01:58 -06:00
SAK.txt
SecurityBugs
serial-console.txt
sgi-ioc4.txt
SM501.txt
smsc_ece1099.txt
sparse.txt
stable_api_nonsense.txt
stable_kernel_rules.txt	stable_kernel_rules.txt: Remove extra space after Cc:	2015-11-20 16:54:57 -07:00
static-keys.txt	locking/static_keys: Fix up the static keys documentation	2015-09-15 07:12:06 +02:00
SubmitChecklist
SubmittingDrivers
SubmittingPatches	A few more documentation patches that wandered in and have no reason to	2015-11-13 09:19:05 -08:00
svga.txt
sysfs-rules.txt
sysrq.txt	mm, oom: do not panic for oom kills triggered from sysrq	2015-09-08 15:35:28 -07:00
this_cpu_ops.txt
ubsan.txt	UBSAN: run-time undefined behavior sanity checker	2016-01-20 17:09:18 -08:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt	vfio: powerpc/spapr: Support Dynamic DMA windows	2015-06-11 15:16:55 +10:00
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
vme_api.txt	Documentation: mention vme_master_mmap() in VME API	2015-06-12 17:26:56 -07:00
volatile-considered-harmful.txt
workqueue.txt	workqueue: fix trivial typo in Documentation/workqueue.txt	2015-05-05 09:50:38 -04:00
xillybus.txt
xz.txt
zorro.txt